package com.sky.service.impl;

import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
public class UserServiceImpl  implements UserService {
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WeChatProperties weChatProperties;

    @Override
    public User login(UserLoginDTO userLoginDTO) {
        //解析授权码并判断当前用户是否存在不存在存到数据库user表
        //1.解析出授权码code
        String code = userLoginDTO.getCode();
        //请求路径
        String url = "https://api.weixin.qq.com/sns/jscode2session";
        //请求参数 map集合
        Map<String,String> map = new HashMap<>();
        map.put("appid", weChatProperties.getAppid());
        map.put("secret", weChatProperties.getSecret());
        map.put("js_code", code);
        map.put("grant_type", "authorization_code");
        //2.向微信服务器发送请求
        String json = HttpClientUtil.doGet(url, map);
        //2.1解析json字符串
        JSONObject jsonObject = JSONObject.parseObject(json);
        //2.2获取openid
        String openid = jsonObject.getString("openid");
        //3.判断openid是否为空为空则抛出异常校验失败
        if (openid == null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        //4.校验成功
        //4.1判断当前用户是否已经存在
        User user = userMapper.getByOpenid(openid);
        if (user == null){
            user = new User();
            user.setOpenid(openid);
            user.setCreateTime(LocalDateTime.now());
            userMapper.insert(user);
        }
        return user;
    }
}
